起重运输机械Issue(2)：96-100,5.
基于模态测试与模型修正的结构损伤识别方法
闫天红 1王凤山 2姜民政 1周国强1
作者信息
- 1. 东北石油大学,大庆 163318
- 2. 大庆油田有限责任公司采油工程研究院,大庆 163712
- 折叠
摘要
Abstract
Structural damage is usually featured by the loss of stiffness in structure and is expressed by the decrease of elastic modulus in the finite element model modification. In the paper, according to the sensitivity of modal parameters to structural elastic modulus changes, the finite element model is modified by using the modal sensitivity method of Bayesian parameter estimation in FEMtools software. The vibration response of three non-damaged and damaged cantilever steel plate specimens is measured by hammering, and the modal frequencies and modes of the structure are obtained in the state of non-damaged and damaged specimens. Through the three damage identification experiments of measured modal parameters and model correction, an optimal method for structural damage identification is sought.关键词
模态测试/有限元模型修正/灵敏度分析/损伤识别Key words
modal test/finite element model correction/sensitivity analysis/damage identification分类
数理科学引用本文复制引用
闫天红,王凤山,姜民政,周国强..基于模态测试与模型修正的结构损伤识别方法[J].起重运输机械,2019,(2):96-100,5.
